Our cities are extremely vulnerable to climate change because of large concentrations of populations and poor infrastructure. Moreover, population densities are increasing in them but we have not yet developed the systems to address climate change impacts. Our cities contribute 65 per cent of the GDP, but there are not enough facilities to cater to the needs of the people- It is important to address the issues of air quality, transport, etc., that are vital to identifying sustainable solutions. We need to involve citizens in city planning and create an ecosystem that meets the needs of the people.

Correct Option (C)

The passage highlights the vulnerability of cities to climate change due to high population densities and inadequate infrastructure. It explicitly states the importance of addressing issues such as air quality and transport, which are "vital to identifying sustainable solutions." Furthermore, it advocates for creating an "ecosystem that meets the needs of the people." These statements collectively indicate that adopting sustainability-related interventions is essential for the maintenance and development of cities, making this the most logical and rational inference.

Incorrect Options:

Option (A): The passage discusses the need for developing systems to address climate change impacts and involving citizens in city planning. However, it does not specifically emphasize or advocate for a well-defined administrative setup with sufficient autonomy as the primary inference.

Option (B): While the passage mentions increasing population densities as a factor contributing to urban vulnerability and the lack of developed systems, it does not present it as an insurmountable hindrance to sustainable development. Instead, the passage focuses on the need to develop systems and adopt solutions despite these challenges.

Option (D): The passage does not mention Public-Private Partnership (PPP) as a viable long-term solution. Its focus is on citizen involvement in city planning and creating sustainable urban ecosystems, without specifying a particular mode of development like PPP.